/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.api.java.io;

import org.apache.flink.annotation.Internal;
import org.apache.flink.api.common.io.OutputFormat;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.util.AbstractID;
import org.apache.flink.util.Preconditions;

import java.io.IOException;

/**
 * This is the inner OutputFormat used for specify the BLOCKING_PERSISTENT result partition type of coming edge.
 * @param <T>
 */
@Internal
public final class BlockingShuffleOutputFormat<T> implements OutputFormat<T> {

	private static final long serialVersionUID = 1L;

	private final AbstractID intermediateDataSetId;

	private BlockingShuffleOutputFormat(AbstractID intermediateDataSetId) {
		this.intermediateDataSetId = intermediateDataSetId;
	}

	public static <T> BlockingShuffleOutputFormat<T> createOutputFormat(AbstractID intermediateDataSetId) {
		return new BlockingShuffleOutputFormat<>(Preconditions.checkNotNull(intermediateDataSetId, "intermediateDataSetId is null"));
	}

	@Override
	public void configure(Configuration parameters) {
		throw new UnsupportedOperationException();
	}

	@Override
	public void open(int taskNumber, int numTasks) throws IOException {
		throw new UnsupportedOperationException();
	}

	@Override
	public void writeRecord(T record) throws IOException {
		throw new UnsupportedOperationException();
	}

	@Override
	public void close() throws IOException {
		throw new UnsupportedOperationException();
	}

	public AbstractID getIntermediateDataSetId() {
		return intermediateDataSetId;
	}
}
